Significant Accounting Policies - At The Market Program (USD $)	1 Months Ended	12 Months Ended
	Jan. 31, 2015	Dec. 31, 2014
June 2014 Equity Distribution Agreement [Member]
Stock Issued Under At the Market Program		2,528,416
Net Proceeds Received From Share Issuances Under At The Market Program		$ 34,200,000
Total value of Common Stock to be issued under Equity Distribution Agreement		35,000,000
Equity Distribution Agreement Date		June 17, 2014
September 2014 Equity Dsitribution Agreement [Member]
Stock Issued Under At the Market Program	13,915	5,073,731
Net Proceeds Received From Share Issuances Under At The Market Program	200,000	68,900,000
Total value of Common Stock to be issued under Equity Distribution Agreement		$ 75,000,000
Equity Distribution Agreement Date		September 3, 2014